Window casement lock



June 16, 1931. w. SCHNELL WINDOW CA SEMENT LOCK Filed Dec. 20, 1929 INVENTOR 601122 e Z Z.

WZ Zlldm BY Patented June 16, 1931 UNITED STATES PATENT Pris] 'WILLIAM SCHNELL, OF DETROIT, MICHIGAN, ASSIGNOR TO TERNSTEDT MANUFACTUR ING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN WINDOW CASEMENT LOCK Application filed December 20,1929. Serial No. 415,469.

This invention relates to a household window casement lock.

cerned with window casement locks of the ltype which consists of a die-cast handle and projecting locking leg which are pivotally mounted by suitable means upen either the window casement or upon the Window casementframe so that the locking leg suitably 10 engages a keeper to inter-engage the window casement and window casement frame. Since the locking legis subjected to relatively great strains and since die-cast metal is well-known to be of less tensile strength 15. than wrought or forged metal, it is the object of this invention to provide the locking leg with a suitable reinforcement insert made of a suitable non-corrosive metal such as chrome iron.

20 Since die-cast metal is relatively soft and not of suflicient hardness to be of high wearing quality, it is a further object of this invention to so cast the reinforcement insert in the locking leg that it will project to the 2 outside of the locking leg and hence provide a hardened wearing surface for engagement with the striker.

In the drawings: Fig. 1 is a fragmentary elevation of a window casement and casement frame showing the lock assembled thereto.

Fig. 2 is a front elevation of the look assembly.

Fig. 3 is a bottom plan view of the look assembly.

Figs. 4 and 5 are detail views of the reinforcement insert.

Figs. 6 and 7 are detail views of the hub.

Figs. 8 and 9 are detail views of the reinforcement insert assembled to the hub.

Fig. 10 is a section along the line 101O of Fig. 2.

Fig. 11 is a plan view of the escutcheon.

Fig. 12 is a fragmentary view of the handle and hub.

In the drawings I have shown a window casement 1 which is hinged to the window casement frame 2 by suitable hinges 3. The window casement 1 is provided with a striker 4 which is arranged to be engaged by the looking leg 5 of the lock assembly whichmay be generally designated 6. This invention is more. particularly con- The lock assembly includes the escutcheon 7 which is mounted upon the window 'casement frame 2 and fixed thereto by any suit- '55 able means such as the screws 8. The escutcheon has rotatably mounted thereupon vthe lock handle 9 and the handle locking leg portion 5. The handle 9 and locking leg por- I tion 5 are an integral casting. 7

Since the locking leg 5 'is arranged to be pivoted from the position shown in the dotted lines (Fig. 1) to the position shown in the full lines where it slidablyengages the striker 4: and hence projects into the path of the swinging window-casement to lock the same against opening, it is obvious that it will be. subjected not only to the strains created when the window is attemptedto be forced open while locked but that the locking leg will also be subjected to a certain amount of wear while slidably engaging and camming the window into closed and locked position. It is wellknown that die-cast metal has relatively low tensile strength and is relatively soft which causes it to wear away fairly fast. Hence, to increase the strength of the locking leg 5 and to provide a suitable wearing face for this leg,I propose to cast a suitable reinforcement insert generally designated 10a-in the look ing leg, and associated handle. The insert is shown in Figs. 4 and 5 and consists of a ring portion 10, a trough-like portion 11', and a flat projecting end portion 12. The trough portion is provided with holes 13 for reception of the metal which'more securely fixes the insert in the casting.

The reinforcement insert has press-fitted in the ring portion 10 thereof the hub 14: (Fig.

9) which has the knurled portion 15 and the counter-bored portion 16.

In fabricating the handle and locking leg portion the brass or other suitable die-cast metal is cast about the hub 14 and associated reinforcement insert 10a so that the reinforcement insert projects through the outside of the locking leg as at 17 (Fig. 10) to present a hard wearing surface to the striker 4. The trough portion 11 is completely surrounded by the die-cast metal in the locking leg 5 and 109 therefore greatly reinforces the locking leg against the stresses and the strains to which it will be subjected in the course of its usage. The tip 12 is used to hold the reinforcement insert in proper position during the casting operation and thereafter is clipped or ground 0 The escutcheon 7 is provided with a suitable opening 18 in which is rotatably mounted the hub 14. A suitable spring washer l9 i s fitted between the escutcheon and the under side of the ring portion 10 of the reinforcement insert. The lower end of the hub 14 has mounted thereover the washer 20 and the counter-bored end of the hub is peened or spun over as at 21 to suitably secure the washer in place and the escutcheon to the handle. The insert 10a is preferably a chrome iron stamping which is non-corrosive but it is understood that it can be made of any metal having the proper hardness, wear-resisting properties and tensile strengt It is evident that I have produced a diecast handle'having a locking leg which is provided with reinforcement means which will greatly increase the tensile strength of the locking leg and which is so positioned that it will present a hardened Wearing surface to the keeper.

The handle 9 is provided with a stop 25. The escutcheon 7 has the arcuate recess 26.

When the handleis assembled to the escutch-,

die-cast handle and locking leg arranged to be movably mounted on one of said members for inter-engaging the said movable members by a sliding cam action, and a. re1n- .forcement insert having a trough-like portion cast within the said. handle and locking leg portion and having a portion projecting through to the outside of the locking leg portion to present a wearing surface during the sliding cam action of the inter-engaging members. 7

2. A look for two relatively movable members comprising in combination a keeper mounted on one of said members, a die-cast locking member arranged to be movably on one of said members, an escutcheon mounted on the other of said members, and a diecast handle having a projecting leg portion arranged to engage the keeper to inter-engage the said members, a reinforcing insert having a ring portion and a hub set in the said ring portion of the reinforcing insert, the saidhub and reinforcing insert being cast inthe said handle and locking leg port on a o q einfe eing a d; rotata y mo i insert, thesaidjhub and reinforcing in sert being cast as a unit in the said handle and locking leg portion with a portion of the said reinforcing insert projecting to the outside of the said locking leg to present a eO wearing surface when the locking leg engages the keeper. p

5. A handle assembly for a window .casement lock comprising in combination an escutcheon having an opening therethrough es a handle having a hollow cylindrical hub, a spring washer interposed between the handle and the escutcheon when the hub is projected through the opening in the escutcheon, the said hub being spun over to operatively, secure said handle to the escutcheon. v

In testimony whereof I afliX my signature.

WILLIAM SGHNELL.

mounted on the other .offsaid members for portion projecting through to the outside of said member to present a wearing surface to the said keeper. p I

3. In a lock assembly for two relatively movable members having a keeper mounted 

